when I try using GGDT I get this error

Run-time error '339':

Component 'MSCHRT20.OCX' or one of it dependencies not correctly registered: a file missing or invalid

what can I do to resolve this issue?

EDIT

I'm running windows 7, 64 bit

Thanks for the help guys

I've been doing lots of research and I have been reading a lot about Hubb's design but can't find the tutorial anywhere, I went to his forum and still can't find it. Can someone post a link please or point me in the right direction?

would a 4"x30" chamber be too big for a bicycle pump? combustion would be too loud for where I want to use these. I intend to attach a 5' tennis ball barrel and I think anything less then 30" would not be optimum. any insight would be helpful